For my tests, I use a couple of vCloud Director services thanks to some really generous service providers which are also Veeam customers. From time to time, I see they upgrade their installations but as an end user is not always straight-forward to find out which version of vCloud Director is in use. But there's a way to find out even for end users.
The original post of this article is here: Quick Tip: how an end user can find out which version of vCloud Director is using